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Dropdowns and lists provide structured ways for users to select and manage values within grids, forms, or tables. By constraining input to predefined options, these controls help maintain data consistency, reduce entry errors, and improve overall usability. They are commonly used in business applications where accuracy and efficiency are important, such as configuration panels, data management tools, and enterprise systems.

Common features include:

• Combobox combines text input with a dropdown list, allowing users to either select from predefined values or enter custom data.
• Checked Combobox extends this by enabling multiple selections through checkboxes within the dropdown.
• Image Combobox enhances visual recognition by displaying icons or images alongside each option.
• Listbox presents a scrollable list of items for single or multiple selection within a fixed area.
• Checked Listbox adds checkbox support to allow users to select multiple items more clearly.
• Image Listbox incorporates images into list items, helping users quickly identify and differentiate between options.

For an in-depth analysis of features and price, visit our ASP.NET Core data editor components comparison.

Explore ASP.NET Core Dropdowns and Lists

Annotation capabilities in PDF Viewer components allow users to interact with documents through visual and textual markup, supporting review, collaboration, and documentation processes. Tools such as Line, Rectangle, and Free text help highlight structure and add clarity, while Sticky note and Stamp annotations provide contextual feedback and status indicators. By embedding these capabilities directly into a viewer, applications can offer a cohesive experience for editing and reviewing PDFs without requiring external software.

Common annotations include:

• Ellipse annotations offer a circular or oval shape tool for highlighting regions in a less rigid form than rectangular annotations.
• Free text annotations let users insert editable text anywhere on the page for inline commentary or corrections.
• Freehand draw (Ink) annotations enable natural, pen-like input for signatures, sketches, or handwritten notes.
• Line annotations allow users to draw straight connectors or highlights between points, often used for pointing out relationships or alignment.
• Rectangle annotations provide a way to frame areas of interest, making it useful for emphasizing sections of a page.
• Stamp annotations apply predefined or custom labels, such as approval or review statuses, directly onto the document.
• Sticky note annotations add comment markers that can store detailed feedback without cluttering the document visually.

For an in-depth analysis of features and price, visit our JavaScript PDF viewer components comparison.

Explore JavaScript PDF Annotation Features